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General calibration mould for surgical navigation and calibration method

A technology for surgical navigation and calibration models, which is applied in the field of general calibration models and calibration, and can solve problems such as complexity, lack of versatility, and cumbersome relationship between instruments

Active Publication Date: 2015-01-28
SYMBOW MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many types of medical imaging equipment, and most of the calibration models used to obtain the above-mentioned coordinate transformation relationship are designed for a specific imaging equipment and lack versatility.
At present, a trend in the development of clinical technology is multi-mode image-guided therapy. Therefore, in the case of multi-image guidance, multiple calibration models are often required to operate one operation, and the relationship between instruments is cumbersome and complicated.
In addition, when the doctor fixes the surgical instrument to the needle holder that can be tracked by the positioning device, it is also necessary to confirm the distance between the end of the surgical instrument (usually the effective position of the surgical instrument during treatment) and the needle holder (the positioning mark of the surgical instrument). The positional relationship among them, this positional relationship also needs to be determined through additional complex calculations

Method used

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  • General calibration mould for surgical navigation and calibration method
  • General calibration mould for surgical navigation and calibration method
  • General calibration mould for surgical navigation and calibration method

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Effect test

Embodiment 1

[0037] In embodiment one, if figure 1As shown, the scanning mark 2 can be composed of three spheres and three cylinders, the three spheres can be scanned and imaged by CT imaging equipment, and a certain solution is filled in the cylinders, which can be scanned and imaged by MRI imaging equipment, so The centerlines of the three cylinders intersect two by two, and the three intersection points of the centerlines are just the centers of the three spheres.

Embodiment 2

[0038] In the second embodiment, if figure 2 As shown, the scanning mark 2 can also be a scalene triangle, which is filled with some kind of solution and can be scanned and imaged by MRI imaging equipment, and at the same time, the triangle can be scanned and imaged by CT imaging equipment.

[0039] In addition, in order to quickly locate the position and direction of the end of the surgical instrument during the operation, the surface of the base 1 is also provided with a needle point positioning point 4 and a linear needle body direction positioning groove 5 . The needle point positioning point 4 can be a pit on the surface of the base 1, or an intersection point of cross lines.

[0040] In the above embodiments, once the relative positional relationship between the needle point positioning point 4 and the positioning mark 3 and between the needle body direction positioning groove 5 and the positioning mark 3 is determined and recorded, it cannot be changed.

[0041] The p...

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Abstract

The invention relates to a general calibration mould for surgical navigation and a calibration method. The calibration mould comprises a base, and further comprises a scanning mark and a positioning mark which are arranged on the base, wherein the scanning mark consists of a geometry which can be imaged by medical imaging equipment; the geometry has feature points and / or feature lines; the feature points and / or the feature lines can determine a unique space right-angled coordinate system; and the positioning mark consists of a geometry which can be detected and tracked by positioning equipment. The calibration mould and the calibration method can be widely applied in the determination of coordinate conversional relations between the medical imaging equipment and various positioning equipment.

Description

technical field [0001] The invention relates to a coordinate system calibration model and a calibration method, in particular to a general calibration model and a calibration method for surgical navigation used to determine the coordinate conversion relationship between medical imaging equipment and various positioning equipment. Background technique [0002] Image-guided surgical navigation treatment systems generally include medical imaging equipment (such as computed tomography equipment CT, C-arm or magnetic resonance imaging equipment MRI), positioning equipment (such as positioning cameras or electromagnetic locators) and surgical instruments and other treatment equipment. During the operation, under the guidance of the positioning device, the doctor will accurately deliver the surgical instruments tracked and positioned by the positioning device to the designated position inside the human body to treat the lesion. Among them, how to accurately obtain the position of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B19/00A61B34/20
Inventor 赵磊宁随军李勇解焕南
Owner SYMBOW MEDICAL TECH
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